Some transitions' name aren’t displayed in the model explorer and produce NPE in the console:

java.lang.NullPointerException
at org.modelio.uml.ui.browser.contrib.labelprovider.UmlLabelProvider$BrowserLabelService.visitTransition(UmlLabelProvider.java:1621)
at org.modelio.metamodel.impl.uml.behavior.stateMachineModel.TransitionImpl.accept(TransitionImpl.java:218)
at org.modelio.metamodel.impl.uml.infrastructure.UmlModelElementImpl.accept(UmlModelElementImpl.java:375)
...

Steps to reproduce:

Import the attached project.

Check the model in the explorer –> Some Transitions’s name aren’t displayed.